Colorado, known as the Centennial State, is celebrated for its breathtaking Rocky Mountains, ski resorts, and vibrant outdoor lifestyle. From the urban energy of Denver to the cultural charm of Boulder and the natural wonders of Mesa Verde, Colorado combines progressive innovation with rugged wilderness. It’s also a leader in renewable energy and craft beer culture, drawing adventurers and entrepreneurs alike.

Colorado’s telecommunications story began with area code 303, assigned in 1947 and once covering the entire state. As Denver and its surrounding areas expanded, 719 and 970 were introduced in 1988 and 1995, respectively. In 1998, the 720 overlay was added to support the booming Denver metro. More recently, 983 was approved as an overlay for 303/720 due to continuing growth. These Colorado area codes reflect the state’s rapid development, especially in technology, aerospace, and tourism sectors.